New Study Links Positive Effects From Calorie Restriction: Why I Hate News Blurbs


Green BeanI literally stopped in my tracks the other morning as I was walking out of the kitchen to go get dressed for work. The first thing I do when I get up in the morning (after pouring that critical first cup of coffee) is turn on the small television that is in our kitchen so that I can listen for the weather and traffic. Like most people, I have my routine that gets me out of the door on time. But that morning, the words I heard caught my ear and I had to listen. “New AMA Study shows calorie restriction has positive benefits!” Oh brother, here we go, giving people another reason to diet. I listened to the brief details (how much can you pack into a 2 minute blurb?) and learned that apparently decreasing your calorie intake by 25 percent can improve your mood, quality of life, sleep and sexual function. Really? I didn’t have time to check into it but knew I had to as I like to be prepared when someone asks me a question about things like this. Most people just automatically believe what they hear and that is what troubles me.

So I searched and found a summary of the study, see AMA Study To read the entire study you have to pay for the article unless you are a member of the American Medical Association (which I am not) so instead I just read the abstract. What I learned from working with many researchers in graduate school is that we need to consider many factors when it comes to study conclusions. We need to be critical. This is not easy, especially if the research is in an area where we are not experts. The field of nutrition and health is a complicated one because so many factors influence our health (and our weight). So I always look at a study and try to decide how much it means, if anything in the real world. I like to look at some of the obvious things, such as the number of subjects and the kind of people who were involved in the study as well as the length of the study. In this study, the 220 subjects were “nonobese” and “healthy”.  The subjects were divided into 2 groups: “calorie restriction” (CR) or “ad libitum” (AL). The measures were taken over 2 years (initial, one year and 2 year) and the results are based on “self-report”, in other words, people answered questionnaires. We know there is always a degree of error in self-report measures as people often answer the way they think they are supposed to. We also can’t know all of the confounding factors, such as the other influences in peoples lives that might have had an effect (a new job, a new baby, getting married, etc.). There are so many factors that affect mood and energy level. To believe that simply decreasing calorie intake can have all these benefits is wishful thinking. Even if after many replicated studies (which is always needed to really show cause and effect) do you really think it would be easy to figure out how to decrease calories by 25 percent? That is a lot! How is nutritional status affected? What if someone decides to cut out milk to achieve this goal? What happens to their bone health over 10 years? Do you think you will be in a better mood if you have osteoporosis? When you can’t get up and walk without pain? Maybe I am being a bit sarcastic and extreme, but the point is, it is never ever that simple.

Unfortunately, the people who heard this news blurb and may react to it are probably the ones who are already dieting and restricting to lose weight. In particular, I worry about those with eating disorders who are looking for an excuse to restrict. Remember, there is always opposing research that shows the exact opposite. In this case, you probably don’t have to do a literature search to know (but there is plenty of evidence there) that starving yourself or excessive dieting is more likely to lead to depression, not being happy. It is more likely to decrease your quality of life, especially if dieting and weight obsession become your focus. People I have worked with who have struggled with eating disorders have often lost so much. Having to take time away from college, or your family to be admitted to the hospital due to dehydration or starving, not being able to participate in activities you always enjoyed just because you don’t eat enough, even not being able to drive (I have seen it). Losing friends because they just can’t be around you any longer and watch you do this to yourself. ….this is the reality of calorie restriction.

Instead,  when you hear a news blurb that briefly shares a dramatic result such as this one, stop and think about how different we all are. Our lifestyles are unique, our dieting history and relationship to food is unique, and most importantly, our genetics are ours alone. Reign yourself in and refocus. What were your goals again? To feel good and be healthy and enjoy life to the fullest (I hope).  What are YOUR obstacles and barriers? Are their habits you have that you know might be affecting your health? Stress from work (need a new job?) Stress in your relationship (need some couples therapy?) Smoke too much (need some help here?) Drink too much (do you need to get help, or work on your habits?) Too tired to be active (time to see the doctor for that physical you keep putting off?) Live on fast food (time to start learning how to cook?)

Achieving health and happiness is not always simple. And even when you do achieve it, trust me, a wrench will be thrown in from time to time, such is life (as my mom always would say).

Decreasing your calories by 25 percent?…..not this girl.


One thought on “New Study Links Positive Effects From Calorie Restriction: Why I Hate News Blurbs

  1. Agreed! I also think studying this without understanding or exploring how dieting/restriction is viewed in our culture is short-sighted. Whenever I started a new round of tighter restriction, I always felt “happy” because I was “taking control” over my life (and troubles) in the only way I felt I could. I also felt like I was “fitting in” to society better as a good dieter, and there is a sort of acceptance with dieting. I have also wondered if there is some chemical euphoria associated with early restriction as I always found the early part of a diet “easy” and fun and the long-term part horrible and almost impossible to maintain mentally or physically. Maybe they need a control group of people who are inadvertently starving somewhere in the world and ask them how happy they are. These kinds of studies help no one, seriously.

    Liked by 1 person

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